Grid Computing has become a regular resource of international research projects for the past ten years. Since current grid structures still need expensive hardware and fiber network connections, the gap between grid computing and general users is still very large.

In this paper, we try to build a data grid system suitable for general users using free Gmail mailbox. It has most of the functions belong to traditional data grid system like:

¨ A uniform interface that allow users to upload and download files. The size of files is only limited to the total storage capacity of this data grid.

¨ When file size exceeds the limit of single message of Gmail, the system will split the file into many slices and save each slice as a plain file. These slices will be merged into the original file when downloads.

¨ The total capacity of this data grid will grow as the number of mail accounts used as storage grows.

¨ Files uploaded will have multiple replicas. These replicas will be saved to the mail accounts that have the freest space. This mechanism prevents the system to fail when single mail account cannot be accessed.

¨ A complete Replica Location Service that allows users to search files stored in the data grid using part or the full name of files. This service will list all the files and their replicas meet the query requirements.

This system can be used in any circumstances of Technical Art area which needs huge storage space, and let more people to benefit from the grid computing research.